205502641026450 has 48 divisors (see below), whose sum is σ = 509675885009760. Its totient is φ = 54797549944320.

The previous prime is 205502641026427. The next prime is 205502641026457. The reversal of 205502641026450 is 54620146205502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (205502641026457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36813880 + ... + 42026979.

It is an arithmetic number, because the mean of its divisors is an integer number (10618247604370).

Almost surely, 2^{205502641026450} is an apocalyptic number.

205502641026450 is an abundant number, since it is smaller than the sum of its proper divisors (304173243983310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205502641026450 is a wasteful number, since it uses less digits than its factorization.

205502641026450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78858251 (or 78858246 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 205502641026450 in words is "two hundred five trillion, five hundred two billion, six hundred forty-one million, twenty-six thousand, four hundred fifty".